Ollie and Sophie

The two best friends Ollie and Sophie comes into Mopatop's Shop looking for a balloon in the episode "Simply Sorry". They end up fighting over a single yellow balloon Mopatop had in stock. Ollie wants to share it, but Sophie wants it for herself. When the balloon blows up Ollie says to Sophie that they are no longer best friends. Finally when Sophie says she's sorry they leave the shop as best friends again.